priceCurrency

http://schema.org/priceCurrency
http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
http://schema.org/Offer
http://schema.org/PriceSpecification
http://schema.org/Reservation
http://schema.org/Ticket
http://schema.org/TradeAction
http://schema.org/Text
The currency of the price, or a price component when attached to PriceSpecification and its subtypes.

Use standard formats: ISO 4217 currency format e.g. "USD"; Ticker symbol for cryptocurrencies e.g. "BTC"; well known names for Local Exchange Tradings Systems (LETS) and other currency types e.g....
priceCurrency